Use tty-port initialised flag rather than private flag to determine when
port is closing down.
Since the tty-port flag is set prior to dropping DTR/RTS (when HUPCL is
set) this avoid submitting the read urbs when resuming the interface in
dtr_rts() only to immediately kill them again in shutdown().
Signed-off-by: Johan Hovold <jhovold@xxxxxxxxx>
---
drivers/usb/serial/usb-wwan.h | 1 -
drivers/usb/serial/usb_wwan.c | 11 +++++++----
2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/usb/serial/usb-wwan.h b/drivers/usb/serial/usb-wwan.h
index 8502f9add334..f22dff58b587 100644
--- a/drivers/usb/serial/usb-wwan.h
+++ b/drivers/usb/serial/usb-wwan.h
@@ -48,7 +48,6 @@ struct usb_wwan_port_private {
struct urb *out_urbs[N_OUT_URB];
u8 *out_buffer[N_OUT_URB];
unsigned long out_busy; /* Bit vector of URBs in use */
- int opened;
struct usb_anchor delayed;
/* Settings for the port */
diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c
index bbcbdaa16c17..2932d9cfb166 100644
--- a/drivers/usb/serial/usb_wwan.c
+++ b/drivers/usb/serial/usb_wwan.c
@@ -395,7 +395,6 @@ int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port)
}
spin_lock_irq(&intfdata->susp_lock);
- portdata->opened = 1;
if (++intfdata->open_ports == 1)
serial->interface->needs_remote_wakeup = 1;
spin_unlock_irq(&intfdata->susp_lock);
@@ -429,8 +428,11 @@ void usb_wwan_close(struct usb_serial_port *port)
portdata = usb_get_serial_port_data(port);
+ /*
+ * Need to take susp_lock to make sure port is not already being
+ * resumed, but no need to hold it due to ASYNC_INITIALIZED.
+ */
spin_lock_irq(&intfdata->susp_lock);
- portdata->opened = 0;
if (--intfdata->open_ports == 0)
serial->interface->needs_remote_wakeup = 0;
spin_unlock_irq(&intfdata->susp_lock);
@@ -645,11 +647,12 @@ int usb_wwan_resume(struct usb_serial *serial)
spin_lock_irq(&intfdata->susp_lock);
for (i = 0; i < serial->num_ports; i++) {
port = serial->port[i];
- portdata = usb_get_serial_port_data(port);
- if (!portdata || !portdata->opened)
+ if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
continue;
+ portdata = usb_get_serial_port_data(port);
+
if (port->interrupt_in_urb) {
err = usb_submit_urb(port->interrupt_in_urb,
GFP_ATOMIC);
--
1.8.5.5
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